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BITSAT2010ChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following pairs has both members from the same period of periodic table:

Options

  1. ANa , Ca
  2. BNa , Cl
  3. CCa , Cl
  4. DCl , Br

Correct answer

B. Na , Cl

Step-by-step solution

₁₁ Na 2,8,1 ; ₁₇ Cl 2,8,7 These have same number of shells. Hence, they are the elements of the same period.

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